# single_sig_auth_descriptor · FT4 Rell API · Chromia Docs (concept)

> function single_ sig_ auth_ descriptor(signer: byte_ array, flags: set<text>): auth_descriptor Creates a single signature auth descriptor given the argumen

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.ft4.core.accounts/single_sig_auth_descriptor/

FUNCTION

# single\_sig\_auth\_descriptor

```signature
function single_sig_auth_descriptor(signer: byte_array, flags: set<text>): auth_descriptor
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/core/accounts/module.rell#lines-566)

Creates a single signature auth descriptor given the arguments with no expiration rules.

**Parameters**

* **signer** — The signer for the auth descriptor
* **flags** — The flags defining the level of authorization

[View this page on docs.chromia.com](https://docs.chromia.com/pages/ft4-rell/-f-t4%20-library/lib.ft4.core.accounts/single_sig_auth_descriptor.html)Generated API reference, mirrored from the live docs